328 Report oF THE DEPARTMENT OF ENTOMOLOGY OF THE 
QUANTITY OF SPRAY AND Cost OF TREATMENT PER TREE. 
eee 
Average Average Average | Total cost 
Nine Of Sprie number of cost of cost of fo) 


gallons spray per | labor per | treatment 
per tree. tree. tree. per tree. 
(iPSa Cts: Cts 
SUlDhUuT Wash fos sens eee we he en ee 17 Ar 39 66 
Miscible oulk cies be coe OP niee Cee 9 41 38 79 
MisciblesOil | ucresarc re eee rere ene ne eeeen aca te 9 50 38 88 
SS SE SRE TSS SSSR SS 
RESULTS ON TREE AND SCALE, 
The application of the sulphur wash caused no injury to the 
trees, and the block receiving this treatment presented throughout 
the summer a very pleasing appearance. The results on the scale 
were the most satisfactory that have been obtained in the orchards 
since the experiments were commenced. These trees produced 
yields of almost clean fruit; and it was only occasionally that an 
apple showing spotting was found. The results of the spraying were 
superior to those of former years in that all the trees were uniformly 
clean, which was due to the use of a wash boiled by steam in place 
of a self-boiled mitxure. Some of the late applications of the 
miscible oil severely injured the trees. These treatments were made 
as the young leaves were making their appearance, and they de- 
stroyed many of the leaves and the blossoms, the ill effects of which 
were apparent throughout the summer, in reduced numbers of 
fruits and less abundant foliage. The treatments with miscible oil 
before the buds burst caused no apparent injuries. This oil did not 
prove as effective as the sulphur wash; for every tree receiving 
this treatment showed more or less spotting by the scale. The 
owner of the orchard thought that possibly the trees were not as 
well sprayed as those treated with the sulphur wash, as it was diffi- 
cult after an application of a miscible oil to determine what part 
of these large trees had or had not been satisfactorily wet. Dur- 
ing the spraying operations it was intended to treat all trees thor- 
oughly and to that end all the spraying mixture apparently required 
to wet all of the bark was applied. 
ONTARIO COUNTY EXPERIMENT. 
The apple orchard of the Station has been used for this experi- 
ment. It comprises 16 acres, including 504 trees, varying in age 
* Purchased at 50 cts. per gallon. 
+ Purchased at 4o cts. per gallon. 
